| ANTHEROZOOID | • antherozooid n. Alternative form of antherozoid. • ANTHEROZOOID n. a motile male gamete produced in an antheridium, also ANTHEROZOID. |
| CHORDOTOMIES | • chordotomies n. Plural of chordotomy. • CHORDOTOMY n. the surgical division of a bundle of nerve fibres in the spinal cord, also CORDOTOMY. |
| HYPOTROCHOID | • hypotrochoid n. (Geometry) A geometric curve traced by a fixed point on the radius line outside one circle which rotates… • HYPOTROCHOID n. the curve traced by a point on the radius, or radius produced, of a circle rolling within another circle. |
| ODONTOPHOBIA | • odontophobia n. An irrational fear of dentistry. • ODONTOPHOBIA n. the fear of teeth. |
| OPISTHODOMOI | • opisthodomoi n. Plural of opisthodomos. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| OPISTHODOMOS | • opisthodomos n. (Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella. • OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple. |
| ORTHODONTIAS | • ORTHODONTIA n. the rectification of crookedness in the teeth, also ORTHODONTICS. |
| ORTHODONTICS | • orthodontics n. (Medicine) A specialty of dentistry concerned with correcting misalignment of teeth. • ORTHODONTICS n. the rectification of crookedness in the teeth, also ORTHODONTIA. |
| ORTHODONTIST | • orthodontist n. An orthodontic dentist. • ORTHODONTIST n. one who practises orthodontics. |
| ORTHODROMICS | • orthodromics n. Orthodromic navigation. • ORTHODROMICS n. the act or art of sailing on a great circle, also ORTHODROMY. |
| ORTHODROMIES | • ORTHODROMY n. the act or art of sailing on a great circle, also ORTHODROMICS. |
| ORTHOPTEROID | • orthopteroid n. (Entomology) Any of the insects historically included in the order Orthoptera, including the cockroaches… • ORTHOPTEROID n. a member of the Orthoptera, cockroaches. |
| PHOTOIONISED | • photoionised adj. Alternative spelling of photoionized. • PHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE. |
| PHOTOIONIZED | • photoionized v. Simple past tense and past participle of photoionize. • photoionized adj. Subject to, or produced by photoionization. • PHOTOIONIZE v. to ionize by electromagnetic radiation, also PHOTOIONISE. |
| PHOTOOXIDISE | • PHOTOOXIDISE v. to undergo photooxidation, also PHOTOOXIDIZE. |
| PHOTOOXIDIZE | • photooxidize v. To oxidize photochemically. • PHOTOOXIDIZE v. to undergo photooxidation, also PHOTOOXIDISE. |
| PHOTOPERIODS | • photoperiods n. Plural of photoperiod. • PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight. |
| TRAITORHOODS | • TRAITORHOOD n. the state of being a traitor. |
| WITHOUTDOORS | • withoutdoors adv. (Archaic) outdoors. • WITHOUTDOORS adv. outdoors. |